CODE EXAMPLE FOR PHP

laravel file upload

$('form').submit(function(event) {
    event.preventDefault();
    var formData = new FormData($(this)[0]);
    $.ajax({
        url: '{{ url('/agents') }}',
        type: 'POST',              
        data: formData,
        success: function(result)
        {
            location.reload();
        },
        error: function(data)
        {
            console.log(data);
        }
    });

});